earth's outer core is as hot as the sun===Section 1.2===

Vocabulary

heat transfer -the movement of energy from a warm object to a cold object

radiation -heat transfer through an empty space

conduction -heat transfer by direct contact

convection -heat transfer by the movement of direct contact

density -the amount of mass and volume in a substance

convection current -the flow that transfers heat within a fluid

Outline

Summmary
-Eath's outer core is as hot as the sun
-heat is always transfered from a warmer substance to a cooler substance
-three types of heat transfer, radiation, conduction, and convection

Radiation
-heat transfer by radiation takes place with no contact between heat source and object
-radiation lets the sun heat the Earth's surface

Conduction
-heat transfer by direct contact
-when spoon heats up in pot of soup heat from the pot and soup is transferd to the particals that make the spoon, gradually the entrie spoon heats up

Convection
-heat transfer by the movement of a heated fluid
-heat transfer by fluids are caused by differences of temperature and density within a fluid
-when a liquid is heated particles move faster and spread apart which causes it to occupy more space amd becomes less dence
-the heating and cooling of fluids changes in the fluids density, and the force of gravity combine to set convection currents into motion
-with out heat the convection currents will eventually stop when all the material meets the same temperature

Convection in Earth's Mantle
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